Regulator for phase-balancers.



E. F. W. ALEXANDERSON. REGULATOR FOR PHASE BALANCERS.

APPLICATION-FILED APR-19,1916- Patented July 17, 1917.

Inventor- Efnt Alex ndersqn- UNITED STATES PATENT OFFICE;

' EBNSTI. W. ALEXANDERSON, OF SCHENECTADY. .IEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A.CORPORATION OF NEW YORK.

To it concern: I

' ment'sjnRe lators fo1-Pl1aso-Bolancer. of

Thig invention rolat'es' to. a i'eguhitmfor 1 t miiiwon sy stcmsi ma-prior patent, Kori] 2111914;- Nd.- I,093 ,5 94' L hgwe. disclosed 1 phg sobail anoeg. applied to y$tei|iinJwliwhfafsmglm all-origins? dyqajnmlkotrii; milchi'no is. con;

' j inofojtliah one "hipso th'g ct 85 its bxoadeStftispc-t', myni'toptlon con- "n, iirlihgcinont gfpfioontiiilling I the 7 fioliplias-Fsyste m in avhiizh 'ashigkphasef Specification of Lettcrs Patent.

' Application filed April 19, 1916. Serial No. 92.155. I

l 'DQRSQN,=E citizen ofthoUnitL-d Statog, re- 4 A "Siding. at Schenectady, in the county of '5 Srjzhenectody, State of New York, hayo 1n- .vielited. oertainnew and nsefnl Improvefor pog tiogg. NQWL Lf irt-h eli 'dgsi ife to ai o'viide qlgiiean s'qfitos' )o'nsive' to f0. component: -ofthd' herg'y in (ii emntfpha esgnf the load; circuit; for 'example,'. the" cutnent ofvolta ge- 5"0' thlfgmjbfoit-oonttollifig the 'inagnitudQ-and di'gectioix .ofj'th voltage" ofthese -xcit ers..; If, ht fifi fc i;jinoutolhntioiregulatoi' ofthewibratx x' g' typo having-ah anti-hunting fcoil,

REGULATOR FOB. PHASE-BALANCERS.

Patented July 1'7, 1917.

ployml'for this pin-pow. it will be seen that tho \ollngonupplierl to the anti-hunting coil will at times w Zero, and during a considerable mrl'of tlw range of operation will not; lw. slllllllulit fmsatisfactory operation. My invention l 'n mjn ri$0sthe zu ra ngemount of such :1 -I'(';Iill:llnl' \i'hereby the anti- :luniting coibof tho rvgnla tnpg are excited with a \"oltz g. which the lilgcliraic snm oontrolli'ngn phnsob'almice 1:01; polyphn'k of Um \ullligzo fipllllld to n porti'on'of the .which vibrating regulators m:r \""b0": rr;1 ngeil :ijcco -(lmg to my llfl'fllllflll for controlling the. main '11 forIa pimposc'to bo later e3 plained; These 'gxc t'ei s' 16 nml l'li have fie](lfwifidings-18. and 19,":cspetively, mach :of which has oneitgrmjfiglrconnetedto the neutral 12 and ,th other tei'minal to all in- 5s to and it the voltage a plied to the field wmdm termediate oint-of a map of resistances R R and signed that R is greater than anee B, may be-made adjustab e. Y

' I then provide a regulator 20 of the vibratprovide areglilutor 30 for controlling the exciter '17 the. portion 7 of thebooster.

field winding. In ic'ommonwith r'egu renderthe movements of the-arm '21 adual. The coil-24 commonly knownia's't e antithe lihl'QQ-Wlm generator, and through the oonduetor28 to the free side of the-exciter 16. The voltage applied to this anti-hunting obil is,therefore, because of the conductor 15, the algebraicsuin of th voltage the. mains 11 and 13 of the hree-wire gen orator 10 and of the voltage of the exciter 16. A relay 26 is arrangd the" anti-hunting c'oil, e circuit therefor being made through a currentelimiting res sistance 27 and aconductor 29. This relay is arranged to'short-circuit the resistance R,

when denergized, and is denergized -by arms '21. and 22 when these are in closed position. In the regulator 80, the numerals 31 to 38,-inclusiv'e, refer. to exactly similar. a parts as-the numerals 21 to28, inclusive in the regulator 20. It will be seenthat the coil 3 ofthis regulator is responsive to the vol ge on Phase B. of the source of supply, while the anti-hunting coil 34 is responsive to the algebraic sum of the voltage of the three-wire generator and the voltage of the rexciter 17.. The coils 23 and as might ectally well be. made. responsive to some ct er energycom onent, such as the current if-it were desired. the-design of the resistances R in hases'A and I gs and 19-wi]1- reversed by the short-circuiting' of the resistance.R,, it being noted that'when this resistance is short- .00 the voltage applied to these field will be that between-the 12 and 13, while'when the resistance'R, is insorted, the voltageapplied will be that be tween the mains 11 and 12. If, now, the.

sitio an ing type for controlling the exciter 1 6 and-,' consequently, the; excitation of theportlon 6" .of the booster field .winding.'- Similarly, I-

latorsof this, type", 'theregiilator 20 comprises two pivotedeoiitaet armsj 21 and 22 associated: eas s 0,9 23 1s responsive'toaan energ component,-

hunting is .co.lfirected thrligh'the wt: rent-limiting resistance 25-to the min 13 of 'of ;,the regulator. I

in Parallel t "Rain-be seefi thins ii-ea mum at beingshort-clreuited by the contacts of the,

I 1. In combination, a

- balancer for balancin "times oiopening and oficlosingof the main .connecte in series across the u mains 1-1 and 13. This connection "will preferably be made between thea'esist'ances B .5 and R and the resistances'i vill be so Tde;

B, but thtlt g R plus R, is greater than'R 'l he resistco'ntacts, '-a ncl hence of therelayoontacts, are

equal, the resultant voltage supplied by the exciters' lfii'and -17.,will,--be "zer0, this c orreeponding to the. condition offbalanced. load. When-the load liecoinesnnbal'ailoed, the

sf 21 o r "31- will assume'a'new-p'w; thelrelative-times of-Zopening-and"l' of. closing of the, contac ts will be varied Ifcontact a? the centactsremain: in a olosed position for It" a greater-percentage of the, time, then' the excite r. voltage "v'vjillbe positive; fo1% exa lnpl e;,.-. -lwhil--.i f theylreln ain .pe'rce'ilta' epithetiiiidit 4 age will erbversed; l uring.tli'is operation-{$0 iiig coils .andfthe relay 'coils=are resphlll'sive" to -avoltage which is theal'gebraie'suln ofa 'howevr,. it .willlgbe seen-:th'at 'jthe'; anti-hiint-i relatively fixpdjvvoltage namely, that,

tween'themaipsii l3 -andnaivnltage 'i t of the gscite'rs 15taiiii'17+w1 ich,i we 1 ria le-ininag'nithde and direction.

Ixithe practiealj workin vention, it ivillbefound. esirable to make-. the yolta'ge'across the mains 1 1 and-133p proa'timate'ly twie s; great .as the rated volt-' age. fr-the excitersg-lfiiand 17.; As a result, the voltage applied to. the anti-hunting. coils is always maintained at a value'at least as large as half of'that' across the mains 11- and '13, and will be chosen so asto be sliflio'iently large for. the satisfactory operation a'regulator 20 which'is trying to maintain l the voltage on phaseAcons'tant at a value fixed bythe sizeof'the'weiglit on the' contact arm 21, amI-a regfilator 30 which ism--- ing to naintaifrthe'voltage on phase B-con stant at=-a. -'va1ue determ'ned by, the size of carried ontf'by controlling 0th the magmthe weight attached to theilarm 31. It will 9 be furtherinoted that this-,0 oration is being tude and the" direction ef-the voltage ip-j plied to the relatively displaced portions of the booster field winding, while at the Same that a.

modifications and changes i made therein without departing from the scope and spirit of. the invention as 1n the appended claims.

What I claim as new and-desire to secure I by Letters Patent of the United States, is, olyphase circuit having an unbalanced loa thereon, a phase a component of the in said ciremt compris ng a field ener having relatively displaced po win tions, means for exciting each portion of said field winding, and means for controls ling the magnitudeand direction of the voltage of said exciting means.

2. In combination, a olyphase circuit having an unbalanced loa thereon, a phase balancer for balancin a component of the energy in said circuit comprising a field winding having relatively displaced portions, an exciter for each portion of said field windin and means responsive to a component 0? the energy in diiferent phases of said circuit for .controlling the magnitude and direction of the voltage of said exciters.

3. In combination, a polyphase circuit having an unbalanced load thereon, a base balancer for balancing the'volta 0 said circuit, comprising a field winding having relatively displaced portions, an exciter for each portion of said field winding, and means responsive to the voltage of difie'rent phases of said circuit, for controlling the magnitude and direction of the voltage of said exciters.

4. In combination a polyphase circuit energy in said circuit compnsmg a. field winding having relatively displaced portions, an'e rciter for each portion of said field windin a regulator for controlling the magnitu e and direction of the voltage of each of said exciters, each regulator having moving contacts, means responsive to a component of the Iener in one phase of said load circuit controlling one contact, and means responsive to the algebraic sum of the voltage of its exciter and a relatively fixed voltage controllingsthe other contact.

5. In combination, a polyphase circuit having an unbalanced load thereon, a phase balanccr for balancing the voltages of said circuit, comprising a field winding having relatively displaced portions, an exciter for each portion of said field windin a regulator for controlling the magnitu e and direction of the voltage of each of said exciters, each regulator having moving contacts, means responsive to the voltage on one phase of said load circuit controlling one contact, and means responsiveto the algebraic sum of the voltage of its exciter, and a relatively fixed voltage controlling the other contact.

6. In combination, a polyphase circuit ,1

having an unbalanced load thereon, a base balancer for balancing the volta 0; said circuit, comprising a field winding having relativelydisplaced portio an exciter for each portion of said field windin a regulator for controlling the magnitu e and 'direction of the voltage of each of saidexciters, each regulator comprisin moving contacts, a solenoid responsive to e voltage of one phase of said load circuit controlling one contact, and a solenoid responsive to. the

algebraic sum of the voltage of its exciterand a relatively-fixedvoltage controlling th; s 0 Z other contact,.the firstmamed solenoi each re ilator being responsive to the voltage of ifl'erent phases.

In witness whereof, I have hereunto set my hand this 17th day April- 1916,

ERNST F. W.- ALEXANDERSQN. 

